Single cylinder pin control system, jib and crane

Abstract

A single cylinder bolt control system, a lifting arm and a crane, the single cylinder bolt control system comprising a telescopic oil cylinder, an arm pin oil cylinder, a cylinder pin oil cylinder, a center passage directional valve and a cylinder arm pin switching valve, the telescopic oil cylinder being provided with an arm pin center oil channel and a cylinder pin center oil channel, one end of the arm pin center oil channel being communicated with an oil cavity of the arm pin oil cylinder, one end of the cylinder pin center oil channel being communicated with an oil cavity of the cylinder pin oil cylinder, the other end of the arm pin center oil channel and the other end of the cylinder pin center oil channel being communicated with the cylinder arm pin switching valve, the center passage directional valve being communicated with the cylinder arm pin switching valve and a high pressure oil circuit or an oil return circuit, and the cylinder arm pin switching valve being communicated with the arm pin center oil channel or the cylinder pin center oil channel and the center passage directional valve, in the single cylinder bolt control system, the lifting arm and the crane, the cylinder arm pin switching valve is connected between the high pressure oil circuit and the telescopic oil cylinder, the cylinder arm pin switching valve can be arranged on a rotary table, and the cylinder arm pin switching valve is convenient to check and the electrical elements on the telescopic oil cylinder are convenient to maintain.

Description

Technical Field

[0001] This invention relates to the field of lifting machinery technology, and in particular to a single-cylinder pin control system, a lifting boom, and a crane. Background Technology

[0002] Multi-arm cranes mostly employ a single-cylinder pin-type telescopic mechanism. The telescopic function of the boom is achieved through the cooperation of a telescopic cylinder, a pin, a boom pin, and a cylinder-boom pin drive mechanism with both pin and boom pin cylinders. Specifically, the pin cylinder drives the pin to engage or disengage, controlling the locking or disengagement of the telescopic cylinder's extension section with the boom segment. The boom pin cylinder drives the boom pin to engage or disengage, controlling the locking or disengagement of adjacent boom segments. When a boom segment needs to be extended, the pin cylinder first drives the pin to lock the telescopic cylinder and the boom segment. Then, the boom pin cylinder drives the boom pin to release the lock between the boom segment and the preceding segment, allowing the boom segment to extend to the target position with the telescopic cylinder. Next, the boom pin, driven by the boom pin cylinder, locks the boom segment to the target position. Finally, the pin cylinder drives the pin to release the lock between the telescopic cylinder and the boom segment, and this process is repeated to achieve the telescopic function.

[0003] In the existing technology, due to the setting of the oil circuit, the cylinder-arm pin switching valve that controls the oil inlet or outlet of the cylinder pin cylinder and arm pin cylinder can only be set inside the boom. When the insertion and removal pins malfunction, it is necessary to go inside the boom to check the status of the solenoid valve of the cylinder-arm pin switching valve, which is very inconvenient.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a single-cylinder pin control system, a lifting boom, and a crane that facilitates the detection of the working status of related components.

[0006] This invention provides a single-cylinder pin control system, including a telescopic cylinder, a boom pin cylinder, a cylinder pin cylinder, a center channel reversing valve, and a boom pin switching valve. The telescopic cylinder has a boom pin center oil passage and a cylinder pin center oil passage. One end of the boom pin center oil passage is connected to the oil chamber of the boom pin cylinder, and the other end of the boom pin center oil passage and the cylinder pin center oil passage are both connected to the cylinder pin switching valve. The center channel reversing valve connects the cylinder pin switching valve to a high-pressure oil circuit or to a return oil circuit. The cylinder pin switching valve connects the boom pin center oil passage to the center channel reversing valve or the cylinder pin center oil passage to the center channel reversing valve.

[0007] In one embodiment, the central channel reversing valve includes a first oil port, a second oil port, and a third oil port. The first oil port is connected to the high-pressure oil circuit, the second oil port is connected to the return oil circuit, and the third oil port is connected to the cylinder arm pin switching valve. The central channel reversing valve includes a first position and a second position. In the first position, the first oil port is connected to the third oil port, and in the second position, the second oil port is connected to the third oil port.

[0008] In one embodiment, the cylinder arm pin switching valve includes a fourth oil port, a fifth oil port, and a sixth oil port. The fourth oil port is connected to the third oil port of the central channel reversing valve via a first one-way valve, and the first one-way valve only allows oil to flow from the fourth oil port to the third oil port. The fourth oil port is also connected to the cylinder pin central oil passage, the third oil port is also connected to the sixth oil port, and the fifth oil port is connected to the cylinder arm pin central oil passage. The cylinder arm pin switching valve includes a third position and a fourth position. In the third position, the fifth oil port is connected to the sixth oil port, and in the fourth position, the fourth oil port and the sixth oil port are connected by a shaft.

[0009] In one embodiment, the single-cylinder pin control system further includes a controller, a wireless input / output receiving module, and a wireless input / output transmitting module. The wireless input / output receiving module is electrically connected to the controller, and the wireless input / output transmitting module is used to transmit data to the wireless input / output receiving module wirelessly.

[0010] In one embodiment, the single-cylinder pin control system further includes a controller, a wireless rangefinder, and a wireless ranging coordination module. The wireless rangefinder is electrically connected to the controller and is used to transmit ranging signals and receive ranging signals wirelessly fed back by the wireless ranging coordination module. The wireless rangefinder is used to measure the extension length of the telescopic cylinder.

[0011] In one embodiment, the single-cylinder pin control system further includes a cylinder pin detection proximity switch, an arm pin detection proximity switch, and an arm code detection proximity switch. The cylinder pin detection proximity switch is used to detect the extension or retraction state of the cylinder pin, the arm pin detection proximity switch is used to detect the extension or retraction state of the arm pin, and the arm code detection proximity switch is used to detect which section of the telescopic arm the pin insertion / retraction mechanism on the telescopic cylinder is in. The central channel reversing valve and the cylinder-arm pin switching valve are both electrically connected to the controller. The controller is used to receive the signals detected by the cylinder pin detection proximity switch, the arm pin detection proximity switch, and the arm code detection proximity switch, and the extension length of the telescopic cylinder measured by the wireless rangefinder, and to control the state of the central channel reversing valve and the cylinder-arm pin switching valve according to the signals detected by the cylinder pin detection proximity switch, the arm pin detection proximity switch, and the arm code detection proximity switch and the extension length of the telescopic cylinder.

[0012] In one embodiment, the single-cylinder pin control system further includes a controller, a wireless power transmission module, and a wireless power receiving module. The wireless power transmission module is electrically connected to the controller, and the wireless power receiving module is used to wirelessly receive the energy transmitted by the wireless power transmission module and convert it into electrical energy as a power supply.

[0013] In one embodiment, the single-cylinder pin control system further includes a controller, a wireless rangefinder, a wireless ranging coordination module, a wireless power supply transmitter module, and a wireless power supply receiver module. The wireless rangefinder and the wireless power supply transmitter module are electrically connected to the controller. The wireless rangefinder is used to transmit ranging signals and receive ranging signals wirelessly fed back by the wireless ranging coordination module. The wireless power supply receiver module is used to wirelessly receive the energy transmitted by the wireless power supply transmitter module and convert it into electrical energy as a power supply. The controller is also used to shut down the wireless power supply transmitter module when the wireless rangefinder does not receive the ranging signal fed back by the wireless ranging coordination module.

[0014] The present invention also provides a lifting boom, including a base boom, a telescopic boom that can extend and retract relative to the base boom, and the aforementioned single-cylinder pin control system.

[0015] In one embodiment, the single-cylinder pin control system further includes a controller, a wireless input / output receiving module, a wireless input / output transmitting module, a wireless rangefinder, a wireless ranging coordination module, a wireless power supply transmitting module, a wireless power supply receiving module, a cylinder pin detection proximity switch, an arm pin detection proximity switch, and an arm code detection proximity switch. The wireless input / output receiving module, the wireless rangefinder, the wireless power supply transmitting module, the cylinder pin detection proximity switch, the arm pin detection proximity switch, and the arm code detection proximity switch are electrically connected to the controller. The wireless input / output transmitting module transmits data to the wireless input / output receiving module wirelessly. The wireless rangefinder transmits ranging signals and receives ranging signals wirelessly fed back from the wireless ranging coordination module. The wireless power supply receiving module wirelessly receives energy transmitted by the wireless power supply transmitting module and converts it into electrical energy as a power supply.

[0016] The wireless input / output receiving module, the wireless rangefinder, and the wireless power supply transmitting module are installed on the basic arm. The wireless input / output transmitting module, the wireless ranging coordination module, and the wireless power supply receiving module are installed on the telescopic cylinder. The cylinder pin detection proximity switch, the arm pin detection proximity switch, and the arm code detection proximity switch are installed on the telescopic cylinder.

[0017] The present invention also provides a crane, including a chassis, a turntable rotatably mounted on the chassis, and a lifting arm rotatably connected to the turntable, wherein the lifting arm is the aforementioned lifting arm, and the cylinder arm pin switching valve is mounted on the turntable.

[0018] In the single-cylinder pin control system, boom, and crane of this invention, by setting two central oil passages, the boom pin switching valve can be connected between the high-pressure oil circuit and the telescopic cylinder. Therefore, the boom pin switching valve can be transferred to the crane's turntable. When the plug pin malfunctions, the status of the boom pin switching valve, which acts as a solenoid valve, can be checked on the turntable, which is very convenient. Furthermore, if the electrical components in the telescopic cylinder inside the boom malfunction, the boom pin switching valve can still be controlled to operate the plug pin, and the operation of the plug pin will not be affected. This allows the boom to extend or retract to a suitable position, facilitating access to the boom for maintenance, which greatly improves the convenience of maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic principle of a single-cylinder pin control system according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 The diagram shows the structural block diagram of the single-cylinder pin control system.

[0021] Figure 3 for Figure 1 The diagram shows the structure of a single-cylinder pin control system.

[0022] Figure 4 This is a schematic diagram of the structure of a crane according to an embodiment of the present invention. Detailed Implementation

[0023] To further illustrate the technical methods and effects of the present invention in order to achieve the intended purpose, the specific implementation methods, structure, features and effects of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] Please refer to Figure 1 An embodiment of the single-cylinder pin control system of the present invention includes a telescopic cylinder 11, a boom pin cylinder 13, a cylinder pin cylinder 15, a central channel reversing valve 17, and a boom pin switching valve 19. The telescopic cylinder 11 has a boom pin central oil passage 112 and a cylinder pin central oil passage 114. One end of the boom pin central oil passage 112 communicates with the oil chamber of the boom pin cylinder 13, and one end of the cylinder pin central oil passage 114 communicates with the oil chamber of the cylinder pin cylinder 15. The other ends of both the boom pin central oil passage 112 and the cylinder pin central oil passage 114 are connected to the boom pin switching valve 19. The central channel reversing valve 17 connects the boom pin switching valve 19 to the high-pressure oil circuit 21 or to the return oil circuit 23. The boom pin switching valve 19 connects the boom pin central oil passage 112 to the central channel reversing valve 17 or the cylinder pin central oil passage 114 to the central channel reversing valve 17. Specifically, the telescopic cylinder 11 is used to drive the telescopic arm of the crane's boom to extend and retract relative to the basic arm, the boom pin cylinder 13 is used to drive the boom pin to extend and retract, and the cylinder pin cylinder 15 is used to drive the cylinder pin to extend and retract. The basic arm can be the first section of the box-type crane boom connected to the turntable.

[0025] In the single-cylinder pin control system of this embodiment, by setting two central oil passages, the cylinder arm pin switching valve can be connected between the high-pressure oil circuit and the telescopic cylinder. Therefore, the cylinder arm pin switching valve can be transferred to the turntable of the crane. When the pin moves abnormally, the status of the cylinder arm pin switching valve, which is a solenoid valve, can be checked on the turntable, which is very convenient. Furthermore, if the electrical components in the telescopic cylinder inside the boom malfunction, the cylinder arm pin switching valve can still be controlled to operate the pin, and the movement of the pin will not be affected. The boom can be extended or retracted to a suitable position, making it easy to enter the boom for maintenance, which greatly improves the convenience of maintenance.

[0026] In this embodiment, the arm pin center oil passage 112 and the cylinder pin center oil passage 114 of the telescopic cylinder 11 pass through the piston rod 116 of the telescopic cylinder 11, pass through the rodless chamber of the telescopic cylinder 11, and pass through the end of the cylinder body 118 near the rodless chamber.

[0027] In this embodiment, the central channel directional valve 17 includes a first port 171, a second port 172, and a third port 173. The first port 171 is connected to the high-pressure oil circuit 21, the second port 172 is connected to the return oil circuit 23, and the third port 173 is connected to the cylinder arm pin switching valve 19. The central channel directional valve 17 has a first position and a second position. In the first position, the first port 171 and the third port 173 are connected; in the second position, the second port 172 and the third port 173 are connected. Specifically, the central channel directional valve 17 can be a solenoid valve.

[0028] In this embodiment, the cylinder arm pin switching valve 19 includes a fourth port 191, a fifth port 192, and a sixth port 193. The fourth port 191 is connected to the third port 173 of the central channel directional valve 17 via a first check valve 195, and the first check valve 195 only allows oil to flow from the fourth port 191 to the third port 173. The fourth port 191 is also connected to the cylinder pin central oil passage 114. The third port 173 is also connected to the sixth port 193, and the fifth port 192 is connected to the cylinder arm pin central oil passage 112. The cylinder arm pin switching valve 19 has a third position and a fourth position. In the third position, the fifth port 192 is connected to the sixth port 193, and in the fourth position, the fourth port 191 is connected to the sixth port 193. Specifically, the cylinder arm pin switching valve 19 can be a solenoid valve.

[0029] In this embodiment, the high-pressure oil circuit 21 is provided with a second check valve 25 that only allows oil to flow to the central channel reversing valve 17. The return oil circuit 23 is provided with a third check valve 27 that only allows oil to flow from the central channel reversing valve 17 to the return oil circuit 23.

[0030] In this embodiment, a filter device 29 is provided between the first one-way valve 195 and the fourth oil port 191.

[0031] In this embodiment, please refer to Figure 2 The single-cylinder pin control system also includes a controller 31, a wireless input / output receiving module 33, and a wireless input / output transmitting module 34. The wireless input / output receiving module 33 is electrically connected to the controller 31. The wireless input / output transmitting module 33 transmits data to the wireless input / output receiving module 34 wirelessly. Specifically, the wireless input / output receiving module 33 can be connected to the controller 31 via a CAN bus. The wireless input / output receiving module 33 and the wireless input / output transmitting module 34 can transmit data using wireless transmission modes such as Bluetooth or Wi-Fi.

[0032] In this embodiment, the single-cylinder pin control system further includes a wireless rangefinder 36 and a wireless ranging coordination module 37. The wireless rangefinder 36 is electrically connected to the controller 31. The wireless rangefinder 36 is used to transmit ranging signals and receive ranging signals wirelessly fed back from the wireless ranging coordination module 37. Specifically, the wireless rangefinder 36 can be connected to the controller 31 via a CAN bus. Specifically, the wireless rangefinder 36 can be an infrared rangefinder, a laser rangefinder, or an ultrasonic rangefinder, etc. Specifically, the wireless rangefinder 36 is used to detect the extension length of the telescopic cylinder 11. When the telescopic cylinder 11 extends, the wireless ranging coordination module 37 moves together with the telescopic arm. The wireless rangefinder 36 can calculate the distance between the wireless rangefinder 36 and the wireless ranging coordination module 37 based on the time it takes for infrared light to travel from the wireless rangefinder 36 to the wireless ranging coordination module 37 and back, thereby obtaining the extension length of the telescopic cylinder 11.

[0033] In this embodiment, the single-cylinder pin control system further includes a wireless power supply transmitter module 39 and a wireless power supply receiver module 41. The wireless power supply transmitter module 39 is electrically connected to the controller 31, and the wireless power supply receiver module 41 is used to wirelessly receive the energy emitted by the wireless power supply transmitter module 39 and convert it into electrical energy as a power supply. Specifically, the wireless power supply transmitter module 39 can be a laser transmitter module, and the wireless power supply receiver module 41 can be a laser receiver module. The laser transmitter module includes an electro-optical conversion module and a laser transmitter, and the laser receiver module includes a photoelectric conversion module and an energy management module. The power supply of the laser transmitter module is connected to the vehicle power supply 42 through relay contacts, and the relay coil is connected to the controller 31. The electro-optical conversion module converts electrical energy into light energy, the laser transmitter emits laser light, the photoelectric conversion module receives the laser light and converts the light energy into electrical energy, and the energy management module converts the received electrical energy into a low-voltage power supply. The voltage of the low-voltage power supply can be, for example, 24V, but is not limited to this. It is understood that the wireless power supply transmitter module 39 and the wireless power supply receiver module 41 can also use other wireless methods such as electromagnetic field energy, microwaves, and mechanical waves for energy transfer. Specifically, the relay can be connected to the controller 31 via a signal line. The vehicle power supply 42 is also used to power the wireless input / output receiver module 33, the wireless rangefinder 36, and the wireless power supply transmitter module 39.

[0034] Specifically, the controller 31 is also used to shut down the wireless power supply transmitter module 39 when the wireless rangefinder 36 does not receive a ranging signal from the wireless ranging coordination module 37. Specifically, when the wireless rangefinder 36 does not receive a ranging signal from the wireless ranging coordination module 37, the controller 31 outputs a low-level signal to the relay, cutting off the power supply to the laser transmitter module and stopping it from emitting energy laser light, thereby saving energy and protecting the user from burns. When the wireless ranging coordination module 37 does not sense the ranging signal emitted by the wireless rangefinder 36, it is usually because an object is blocking the ranging signal emitted by the wireless rangefinder 36.

[0035] In this embodiment, both the center channel directional valve 17 and the cylinder arm pin switching valve 19 are electrically connected to the controller 31, which controls the state of the center channel directional valve 17 and the cylinder arm pin switching valve 19. The center channel directional valve 17 and the cylinder arm pin switching valve 19 can be connected to the controller 31 via signal lines.

[0036] In this embodiment, the single-cylinder pin control system further includes a cylinder pin detection proximity switch 45, an arm pin detection proximity switch 46, and an arm code detection proximity switch 47 electrically connected to the wireless input / output transmission module 34. The wireless input / output transmission module 34 receives data detected by the cylinder pin detection proximity switches 45, arm pin detection proximity switches 46, and arm code detection proximity switches 47, and transmits it to the wireless input / output receiving module 33. The wireless power supply receiving module 41 supplies power to the wireless input / output transmission module 34, the cylinder pin detection proximity switches 45, arm pin detection proximity switches 46, and arm code detection proximity switches 47. The cylinder pin detection proximity switch 45 is used to detect the extension or retraction state of the cylinder pin, that is, to detect whether the cylinder pin is extended or retracted into the side wall of the telescopic cylinder. The arm pin detection proximity switch 46 is used to detect the extension or retraction state of the arm pin, that is, to detect whether the arm pin is extended or retracted into the side wall of the telescopic arm. The arm code detection proximity switch 47 is used to detect which section of the telescopic arm the insertion and removal pin mechanism on the telescopic cylinder 11 is at, that is, to detect the relative position relationship between the telescopic cylinder 11 and the lifting arm. Specifically, the controller 31 can control the state of the central channel reversing valve 17 and the cylinder-arm pin switching valve 19 based on the signals detected by the cylinder pin detection proximity switches 45, arm pin detection proximity switches 46 and arm code detection proximity switches 47 and the extension length of the telescopic cylinder 11, thereby controlling the extension and retraction of the arm pin cylinder 13 and the cylinder pin cylinder 15, and realizing the control of the extension and retraction of the arm pin and the cylinder pin.

[0037] In the single-cylinder pin control system of this embodiment, by setting up a wireless input / output receiving module 33, a wireless input / output transmitting module 34, a wireless rangefinder 36, a wireless ranging coordination module 37, a wireless power supply transmitting module 39, and a wireless power supply receiving module 41, the signal transmission, power supply, and ranging are carried out wirelessly. Therefore, the cable reel can be omitted, avoiding the situation in the prior art where the cable reel is constantly pulled out and retracted during the extension and retraction of the crane arm, which may cause interference with other objects and prevent it from rotating. This avoids the problem of the cable being pulled out or crushed due to its inability to be pulled out or retracted normally, and also avoids the problem of the cable being damaged inside the crane arm and inconvenient to repair. Therefore, the reliability of the single-cylinder pin control system is greatly improved.

[0038] The present invention also provides a lifting boom, including a basic boom, a telescopic boom that can extend and retract relative to the basic boom, and the above-mentioned single-cylinder pin control system.

[0039] In this embodiment, please refer to Figure 3One end of the piston rod 116 of the telescopic cylinder 11 is hinged to the base arm, and the cylinder body 118 of the telescopic cylinder 11 is connected to the telescopic arm. When the telescopic cylinder 11 drives the crane arm to extend or retract, the piston rod remains stationary while the cylinder body moves.

[0040] In this embodiment, the wireless input / output receiving module 33 is installed on the basic arm, and the wireless input / output transmitting module 34 is installed on the telescopic cylinder.

[0041] In this embodiment, the wireless rangefinder 36 is installed on the basic arm, and the wireless ranging coordination module 37 is installed on the telescopic cylinder.

[0042] In this embodiment, the wireless power supply transmitter module 39 is installed on the basic arm, and the wireless power supply receiver module 41 is installed on the telescopic cylinder.

[0043] In this embodiment, the cylinder pin detection proximity switch 43, the arm pin detection proximity switch 45, and the arm code detection proximity switch 47 are installed on the telescopic cylinder.

[0044] The present invention also provides a crane, please refer to Figure 4 It includes a chassis 51, a turntable 53 rotatably mounted on the chassis 51, and a lifting arm 55 rotatably connected to the turntable 53. The lifting arm 55 is the lifting arm in the above embodiment.

[0045] In this embodiment, the boom pin switching valve 19 is installed on the turntable 53. In the crane of this embodiment, the boom pin switching valve is transferred to the turntable of the crane. When the insertion and removal pins malfunction, the status of the boom pin switching valve, which acts as a solenoid valve, can be checked on the turntable, which is very convenient. Furthermore, if there is a problem with the electrical components in the telescopic cylinder inside the boom, the boom pin switching valve can still be controlled to operate the insertion and removal pins. The action of the insertion and removal pins will not be affected, and the boom can be extended or retracted to a suitable position, making it easy to enter the boom for maintenance. This also greatly improves the convenience of maintenance.

[0046] The following is a brief description of the working process of the single-cylinder pin control system.

[0047] After the electrical system is powered on, the boom is in its initial state. At this time, the cylinder pin on the telescopic cylinder 11 is inserted into the cylinder pin hole on the boom, and the boom pin is inserted into the boom pin hole. Both the cylinder pin and the boom pin are in the extended state, and the cylinder-boom pin switching valve 19 and the central channel reversing valve 17 are de-energized. At this time, the wireless rangefinder 36 is powered on and starts working, measuring the extension length of the telescopic cylinder 11 in real time and sending its value to the controller 31. The laser emitting module is powered on and emits a laser. The laser receiving module receives the laser and converts it into low-voltage power to power the wireless input / output transmitting module 34, the cylinder pin detection proximity switch 45, the boom pin detection proximity switch 46, and the boom code detection proximity switch 47. The wireless input / output transmitting module 34 sends the signals detected by the cylinder pin detection proximity switch 45, the boom pin detection proximity switch 46, and the boom code detection proximity switch 47 to the wireless input / output receiving module 33. After receiving the signal, the wireless input / output receiving module 33 transmits it to the controller 31 through the bus, and the controller 31 performs logic control.

[0048] When the boom begins to extend, the controller 31, based on the target combination and the detected boom code signal, energizes the central channel directional valve 17 and de-energizes the cylinder-boom pin switching valve 19. At this time, the boom pin center oil passage 112 is filled with oil, and the boom pin retracts; the cylinder pin center oil passage 114 is not filled with oil, and the cylinder pin remains extended. After receiving the boom pin retraction detection proximity switch 46 signal, the controller 31 controls the telescopic cylinder 11 to extend forward, which in turn drives the telescopic boom to extend via the cylinder pin. The wireless rangefinder 36 measures the extension length of the telescopic cylinder 11 in real time. After reaching the target length, the controller 31 de-energizes both the central channel directional valve 17 and the cylinder-boom pin switching valve 19, and the hydraulic oil in the boom pin center oil passage 112 returns to the oil tank, allowing the boom pin to extend. After receiving the signal from the boom pin extension detection proximity switch 46, the controller 31 energizes both the control center channel directional valve 17 and the boom pin switching valve 19. At this time, the boom pin center oil passage 114 is filled with oil, and the boom pin retracts; the boom pin center oil passage 112 is not filled with oil, and the boom pin remains extended. After receiving the signal from the boom pin retraction detection proximity switch 45, the controller 31 controls the telescopic cylinder 11 to retract. When the target telescopic boom's arm code detection proximity switch 47 detects the signal, the controller 31 de-energizes the control center channel directional valve 17 and energizes the boom pin switching valve 19. Alternatively, the controller can de-energize both the control center channel directional valve 17 and the boom pin switching valve 19, causing the boom pin to extend; the boom pin center oil passage 112 is not filled with oil, and the boom pin remains extended. When controller 31 receives a signal from cylinder pin extension detection proximity switch 45, control center channel reversing valve 17 is energized and cylinder arm pin switching valve 19 is de-energized. At this time, the arm pin center oil passage 112 is filled with oil, and the arm pin retracts; the cylinder pin center oil passage 114 is not filled with oil, and the cylinder pin remains extended. The previous cycle is repeated until the target telescopic arm is fully extended. After the arm extension is completed, both the cylinder pin and the arm pin are in the extended state.

[0049] When the boom retraction begins, controller 31 energizes the central channel directional valve 17 and de-energizes the boom pin switching valve 19. At this time, the boom pin center oil passage 112 is filled with oil, and the boom pin retracts; the cylinder pin center oil passage 114 is not filled with oil, and the cylinder pin remains extended. After receiving the signal from the boom pin retraction detection proximity switch 46, the controller controls the telescopic cylinder 11 to retract, which in turn drives the boom to retract via the cylinder pin. When controller 31 receives the cylinder length measured by the wireless rangefinder 36 as reaching the target length, both the central channel directional valve 17 and the boom pin switching valve 19 are de-energized. The hydraulic oil in the boom pin center oil passage 112 returns to the oil tank, and the boom pin extends; the cylinder pin center oil passage 114 is not filled with oil, and the cylinder pin remains extended. After receiving the signal from the boom pin extension detection proximity switch 46, controller 31 energizes the central channel directional valve 17 and the boom pin switching valve 19, and the cylinder pin retracts; the boom pin center oil passage 112 is not filled with oil, and the boom pin remains extended. When controller 31 receives a signal from cylinder pin retraction detection proximity switch 45, it controls the hydraulic cylinder to extend forward, at which point the telescopic arm is disengaged from the cylinder. When controller 31 receives a signal from target telescopic arm arm code detection proximity switch 47, it de-energizes the control center channel directional valve 17 and energizes both the cylinder pin and arm pin switching valve 19. Alternatively, it can de-energize both the control center channel directional valve 17 and the cylinder pin switching valve 19, causing the cylinder pin to extend. Since the arm pin center oil passage 112 is not filled with oil, the arm pin remains extended. After controller 31 receives a signal from cylinder pin extension detection proximity switch 45, it energizes the control center channel directional valve 17 and de-energizes the cylinder pin switching valve 19, causing the arm pin to retract. Since the cylinder pin center oil passage 114 is not filled with oil, the cylinder pin remains extended. This cycle repeats until the target telescopic arm is fully retracted. After retraction is complete, both the cylinder pin and arm pin are extended.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A single-cylinder pin control system, comprising a telescopic cylinder (11), an arm pin cylinder (13), a cylinder pin cylinder (15), a central channel reversing valve (17), and an arm pin switching valve (19), characterized in that, The telescopic cylinder (11) is provided with an arm pin center oil passage (112) and a cylinder pin center oil passage (114). One end of the arm pin center oil passage (112) is connected to the oil chamber of the arm pin cylinder (13), and one end of the cylinder pin center oil passage (114) is connected to the oil chamber of the cylinder pin cylinder (15). The other ends of the arm pin center oil passage (112) and the other ends of the cylinder pin center oil passage (114) are both connected to the cylinder arm pin switching valve (19). The center channel directional valve (17) is used to connect the cylinder arm pin switching valve (19) to the high pressure oil circuit (21) or the cylinder arm pin switching valve (19) to the return oil circuit (23). The cylinder arm pin switching valve (19) is used to connect the arm pin center oil passage (112) to the center channel directional valve (17) or the cylinder pin center oil passage (114) to the center channel directional valve (17). The cylinder arm pin switching valve (19) is located on the turntable (53) of the crane. The single-cylinder pin control system also includes a controller (31), a wireless rangefinder (36), and a wireless ranging coordination module (37). The wireless rangefinder (36) is electrically connected to the controller (31). The wireless rangefinder (36) is used to transmit ranging signals and receive ranging signals wirelessly fed back by the wireless ranging coordination module (37). The wireless rangefinder (36) is used to measure the extension length of the telescopic cylinder (11).

2. The single-cylinder pin control system as described in claim 1, characterized in that, The central channel reversing valve (17) includes a first oil port (171), a second oil port (172), and a third oil port (173). The first oil port (171) is connected to the high-pressure oil circuit (21), the second oil port (172) is connected to the return oil circuit (23), and the third oil port (173) is connected to the cylinder arm pin switching valve (19). The central channel reversing valve (17) includes a first position and a second position. In the first position, the first oil port (171) is connected to the third oil port (173), and in the second position, the second oil port (172) is connected to the third oil port (173).

3. The single-cylinder pin control system as described in claim 2, characterized in that, The cylinder arm pin switching valve (19) includes a fourth port (191), a fifth port (192), and a sixth port (193). The fourth port (191) is connected to the third port (173) of the central channel reversing valve (17) via a first check valve (195). The first check valve (195) only allows oil to flow from the fourth port (191) to the third port (173). The fourth port (191) is also connected to the... The cylinder pin center oil passage (114) is described above. The third oil port (173) is also connected to the sixth oil port (193). The fifth oil port (192) is connected to the arm pin center oil passage (112). The cylinder arm pin switching valve (19) includes a third position and a fourth position. In the third position, the fifth oil port (192) is connected to the sixth oil port (193). In the fourth position, the fourth oil port (191) is connected to the sixth oil port (193).

4. The single-cylinder pin control system as described in claim 1, characterized in that, The single-cylinder pin control system also includes a controller (31), a wireless input / output receiving module (33), and a wireless input / output transmitting module (34). The wireless input / output receiving module (33) is electrically connected to the controller (31), and the wireless input / output transmitting module (34) is used to transmit data to the wireless input / output receiving module (33) wirelessly.

5. The single-cylinder pin control system as described in claim 1, characterized in that, The single-cylinder pin control system also includes a cylinder pin detection proximity switch (45), an arm pin detection proximity switch (46), and an arm code detection proximity switch (47). The cylinder pin detection proximity switch (45) is used to detect the extension or retraction state of the cylinder pin. The arm pin detection proximity switch (46) is used to detect the extension or retraction state of the arm pin. The arm code detection proximity switch (47) is used to detect which telescopic arm the pin insertion and removal mechanism on the telescopic cylinder (11) is in. The central channel reversing valve (17) and the cylinder arm pin switching valve (19) are both electrically connected to the controller (31). The controller (31) is used to receive signals detected by the cylinder pin detection proximity switch (45), the arm pin detection proximity switch (46) and the arm code detection proximity switch (47) and the extension length of the telescopic cylinder (11) measured by the wireless rangefinder (36), and to control the state of the central channel reversing valve (17) and the cylinder arm pin switching valve (19) according to the signals detected by the cylinder pin detection proximity switch (45), the arm pin detection proximity switch (46) and the arm code detection proximity switch (47) and the extension length of the telescopic cylinder (11).

6. The single-cylinder pin control system as described in claim 1, characterized in that, The single-cylinder pin control system also includes a controller (31), a wireless power transmission module (39), and a wireless power receiving module (41). The wireless power transmission module (39) is electrically connected to the controller (31), and the wireless power receiving module (41) is used to wirelessly receive the energy transmitted by the wireless power transmission module (39) and convert it into electrical energy as a power supply.

7. The single-cylinder pin control system as described in claim 1, characterized in that, The single-cylinder pin control system also includes a wireless power supply transmitter module (39) and a wireless power supply receiver module (41). The wireless rangefinder (36) and the wireless power supply transmitter module (39) are electrically connected to the controller (31). The wireless power supply receiver module (41) is used to wirelessly receive the energy emitted by the wireless power supply transmitter module (39) and convert it into electrical energy as a power supply. The controller (31) is also used to turn off the wireless power supply transmitter module (39) when the wireless rangefinder (36) does not receive the ranging signal fed back by the wireless ranging coordination module (37).

8. A crane boom, characterized in that, It includes a base arm, a telescopic arm that can extend and retract relative to the base arm, and a single-cylinder pin control system as described in any one of claims 1-3.

9. The lifting boom as described in claim 8, characterized in that, The single-cylinder pin control system also includes a controller (31), a wireless input / output receiving module (33), a wireless input / output transmitting module (34), a wireless rangefinder (36), a wireless ranging coordination module (37), a wireless power supply transmitting module (39), a wireless power supply receiving module (41), a cylinder pin detection proximity switch (45), an arm pin detection proximity switch (46), and an arm code detection proximity switch (47). The arm pin detection proximity switch (46) and the arm code detection proximity switch (47) are electrically connected to the controller (31). The wireless input / output transmitting module (33) is used to transmit data to the wireless input / output receiving module (34) wirelessly. The wireless rangefinder (36) is used to transmit ranging signals and receive ranging signals wirelessly fed back by the wireless ranging coordination module (37). The wireless power supply receiving module (41) is used to wirelessly receive the energy transmitted by the wireless power supply transmitting module (39) and convert it into electrical energy as a power supply. The wireless input / output receiving module (33), the wireless rangefinder (36), and the wireless power supply transmitting module (39) are installed on the basic arm. The wireless input / output transmitting module (34), the wireless ranging coordination module (37), and the wireless power supply receiving module (41) are installed on the telescopic cylinder. The cylinder pin detection proximity switch (45), the arm pin detection proximity switch (46), and the arm code detection proximity switch (47) are installed on the telescopic cylinder.

10. A crane, characterized in that, It includes a chassis (51), a turntable (53) rotatably mounted on the chassis (51), and a lifting arm (55) rotatably connected to the turntable (53), wherein the lifting arm (55) is the lifting arm as described in claim 8 or 9, and the cylinder arm pin switching valve (19) is mounted on the turntable (53).

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